ALSA: hda - add flags and routines to get devices selection info for DP1.2 MST
This patch adds flags and routines to get device list & selection info on
a pin.
To support Display Port 1.2 multi-stream transport (MST) over single DP port,
a pin can support multiple devices. Please refer to HD-A spec Document Change
Notificaton HDA040-A.
A display audio codec can set flag "dp_mst" in its patch, indicating its pins
can support MST. But at runtime, a pin may not be multi-streaming capable and
report the device list is empty, depending on Gfx driver configuration.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 701c2e0..b838c70 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -94,6 +94,8 @@
#define AC_VERB_GET_HDMI_DIP_XMIT 0x0f32
#define AC_VERB_GET_HDMI_CP_CTRL 0x0f33
#define AC_VERB_GET_HDMI_CHAN_SLOT 0x0f34
+#define AC_VERB_GET_DEVICE_SEL 0xf35
+#define AC_VERB_GET_DEVICE_LIST 0xf36
/*
* SET verbs
@@ -133,6 +135,7 @@
#define AC_VERB_SET_HDMI_DIP_XMIT 0x732
#define AC_VERB_SET_HDMI_CP_CTRL 0x733
#define AC_VERB_SET_HDMI_CHAN_SLOT 0x734
+#define AC_VERB_SET_DEVICE_SEL 0x735
/*
* Parameter IDs
@@ -154,6 +157,7 @@
#define AC_PAR_GPIO_CAP 0x11
#define AC_PAR_AMP_OUT_CAP 0x12
#define AC_PAR_VOL_KNB_CAP 0x13
+#define AC_PAR_DEVLIST_LEN 0x15
#define AC_PAR_HDMI_LPCM_CAP 0x20
/*
@@ -352,6 +356,10 @@
#define AC_LPCMCAP_44K (1<<30) /* 44.1kHz support */
#define AC_LPCMCAP_44K_MS (1<<31) /* 44.1kHz-multiplies support */
+/* Display pin's device list length */
+#define AC_DEV_LIST_LEN_MASK 0x3f
+#define AC_MAX_DEV_LIST_LEN 64
+
/*
* Control Parameters
*/
@@ -460,6 +468,11 @@
#define AC_DEFCFG_PORT_CONN (0x3<<30)
#define AC_DEFCFG_PORT_CONN_SHIFT 30
+/* Display pin's device list entry */
+#define AC_DE_PD (1<<0)
+#define AC_DE_ELDV (1<<1)
+#define AC_DE_IA (1<<2)
+
/* device device types (0x0-0xf) */
enum {
AC_JACK_LINE_OUT,
@@ -885,6 +898,7 @@
unsigned int pcm_format_first:1; /* PCM format must be set first */
unsigned int epss:1; /* supporting EPSS? */
unsigned int cached_write:1; /* write only to caches */
+ unsigned int dp_mst:1; /* support DP1.2 Multi-stream transport */
#ifdef CONFIG_PM
unsigned int power_on :1; /* current (global) power-state */
unsigned int d3_stop_clk:1; /* support D3 operation without BCLK */
@@ -972,6 +986,8 @@
const hda_nid_t *list);
int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux,
hda_nid_t nid, int recursive);
+int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
+ u8 *dev_list, int max_devices);
int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
u32 *ratesp, u64 *formatsp, unsigned int *bpsp);